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The test assumed that advancing WAL would lead to a checkpoint that invalidates the obsolete replication slot. If a checkpoint that started before the WAL switch completes first, the following checkpoint can be skipped as idle, so the expected walsender termination is not logged. Force a CHECKPOINT in a background psql session after advancing WAL, so the slot invalidation is exercised deterministically. This has been observed on buildfarm members alligator and partridge: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=alligator&dt=2024-12-13%2001%3A24%3A58 https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=partridge&dt=2026-08-06%2018%3A00%3A11 Backpatch to all supported versions. Reported-by: Alexander Lakhin <exclusion@gmail.com> Author: Hayato Kuroda <kuroda.hayato@fujitsu.com> Reviewed-by: Alexander Lakhin <exclusion@gmail.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/0b07ead5-a5da-445e-9698-a7d340708bdf@gmail.com Backpatch-through: 14
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.